CN202153640U - EMI filtering device - Google Patents
EMI filtering device Download PDFInfo
- Publication number
- CN202153640U CN202153640U CN2011203060523U CN201120306052U CN202153640U CN 202153640 U CN202153640 U CN 202153640U CN 2011203060523 U CN2011203060523 U CN 2011203060523U CN 201120306052 U CN201120306052 U CN 201120306052U CN 202153640 U CN202153640 U CN 202153640U
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- wire system
- metal shell
- filtering device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001914 filtration Methods 0.000 title abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000005266 casting Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 230000005764 inhibitory process Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000000565 sealant Substances 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000009421 internal insulation Methods 0.000 abstract 1
- 230000001151 other effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Filters And Equalizers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present utility model discloses an EMI filtering device. The device is composed of a metal shell which successively comprises an input end, a surge absorption circuit, a barrage jamming circuit, a leakage circuit, a common mode choke flow circuit and an input end which are mutually connected. The wiring method of the input end is a two-phase two-wire system, a two-phase three-wire system, a three-phase three-wire system, a three-phase four-wire system or a three-phase five-wire system, the metal shell is connected with the ground, and the inside of the metal shell is sealed with pouring sealant. A filtering device of electric appliance equipment is independently separated from the whole circuit, thus the aims of convenient maintenance, independent upgrade and product standardization can be realized. Moreover, as the metal shell is connected with the ground, the external electric appliance interference can be well shielded; and as the inside of the filtering device is sealed with the pouring sealant, internal insulation, heat radiation, shockproof performance and other effects can be reinforced.
Description
Technical field
The utility model relates to a kind of kitchen appliance and uses circuit arrangement, particularly relates to a kind of EMI filter.
Background technology
The filter of existing kitchen appliance puts together with other circuit, receives extraneous electrical equipment easily and disturbs, and can not well arrive filter action, and damage easily, and easy care has not reduced useful life.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of EMI filter is provided, and circuit structure is simple, and is easy to maintenance, and cost has been practiced thrift in the ability standalone upgrade.
In order to achieve the above object; The technical scheme that the utility model adopts is: a kind of EMI filter; Comprising metal shell, comprise interconnective input, pop wave absorbing circuit, inhibition interfered circuit, leadage circuit, common mode choke circuit and output successively, is two-phase two-wire system, two-phase three-wire system, three-phase three-wire system, three-phase four-wire system or three-phase five-wire mode in the mode of connection of input; Metal shell ground connection seals with casting glue in the inside of metal shell.Suppressing interfered circuit forms by suppressing common mode disturbances and DM EMI two parts.
Compared with prior art, the beneficial effect of the utility model is: with the filter on electric equipment part independent separate from entire circuit, thereby reach maintain easily, the purpose of standalone upgrade, the standardization of products; Metal shell ground connection can shield extraneous electrical equipment interference effect preferably, seals with casting glue in filter inside, can strengthen built-in electrical insulation, heat radiation, effect such as shockproof.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Embodiment
The purport of the utility model is to overcome the deficiency of prior art, and a kind of EMI filter is provided, with the filter on electric equipment part independent separate from entire circuit, thereby reach maintain easily, the purpose of standalone upgrade, the standardization of products.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that the technical characterictic and the advantage of the utility model are carried out more deep annotation.
The theory diagram of the utility model is as shown in Figure 1; A kind of EMI filter; Comprising metal shell, comprise interconnective input, pop wave absorbing circuit, inhibition interfered circuit, leadage circuit, common mode choke circuit and output successively, is two-phase two-wire system, two-phase three-wire system, three-phase three-wire system, three-phase four-wire system or three-phase five-wire mode in the mode of connection of input; Metal shell ground connection seals with casting glue in the inside of metal shell.Metal shell ground connection can shield extraneous electrical equipment interference effect preferably, seals with casting glue in filter inside, can strengthen built-in electrical insulation, heat radiation, effect such as shockproof.
The acting as of the pop wave absorbing circuit overvoltage surging that lightning produces that suppresses to thunder; Suppress the overvoltage surging that the appliance switch process produces; Absorb the continuous impulse crowd who periodically occurs between appliance circuit.Suppress interfered circuit and form by suppressing common mode disturbances and DM EMI two parts, be the major part of general power-supply filter, it is formed by resistance, inductance and the X/Y safety electric capacity matched combined of different parameters.Leadage circuit act as release module and electrical equipment inner section electricity the time the remaining electric charge that produces, thereby guarantee electrical equipment and people's safety.The common mode choke circuit is the chief component of filter, is the critical component of general power-supply filter, act as the extraneous electromagnetic interference of filtering, suppresses the not external electromagnetic interference of electrical equipment itself.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim scope change and modify, and all should belong to the covering scope of the utility model claim.
Claims (5)
1. an EMI filter comprises metal shell, it is characterized in that: described filter comprises interconnective input, pop wave absorbing circuit, inhibition interfered circuit, leadage circuit, common mode choke circuit and output successively.
2. EMI filter according to claim 1 is characterized in that: the mode of connection of the input of described device is two-phase two-wire system, two-phase three-wire system, three-phase three-wire system, three-phase four-wire system or three-phase five-wire mode.
3. EMI filter according to claim 2 is characterized in that: the inhibition interfered circuit of described device is formed by suppressing common mode disturbances and DM EMI two parts.
4. according to each described EMI filter in the claim 1～3, it is characterized in that: described metal shell ground connection.
5. EMI filter according to claim 4 is characterized in that: the casting glue seal is used in the inside of described metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203060523U CN202153640U (en) | 2011-08-22 | 2011-08-22 | EMI filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203060523U CN202153640U (en) | 2011-08-22 | 2011-08-22 | EMI filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153640U true CN202153640U (en) | 2012-02-29 |
Family
ID=45694134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203060523U Expired - Lifetime CN202153640U (en) | 2011-08-22 | 2011-08-22 | EMI filtering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691226A (en) * | 2021-08-24 | 2021-11-23 | 上海埃德电子股份有限公司 | On-line repairing method for power filter with failure of shielding facility |
-
2011
- 2011-08-22 CN CN2011203060523U patent/CN202153640U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691226A (en) * | 2021-08-24 | 2021-11-23 | 上海埃德电子股份有限公司 | On-line repairing method for power filter with failure of shielding facility |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120229 |
|
| CX01 | Expiry of patent term |